Noise Reduction for Dual-Microphone Mobile Phones Exploiting Power Level Differences

Authors:

Jeub, M. ,  Herglotz, C. ,  Nelke, C. M. ,  Beaugeant, C. ,  Vary, P.

Book Title:

Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

Organization:

IEEE

Date:

Mar. 2012

Note:

NEC best paper award

Language:

English

Abstract

This paper discusses the application of noise reduction algorithms for dual-microphone mobile phones. An analysis of the acoustical environment based on recordings with a dual-microphone mock-up phone mounted on a dummy head is given. Motivated by the recordings, a novel dual-channel noise reduction algorithm is proposed. The key components are a noise PSD estimator and an improved spectral weighting rule which both explicitly exploit the power level differences of the desired speech signal between the microphones. Experiments with recorded data show that this low complexity system has a good performance and is beneficial for an integration into future mobile communication devices.

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